The Great Fog (5 page)

Sersen continued his own research on the mold itself, on the “field of humidity” around each plant. He next made a number of calculations correlating the rapid rate of dispersal, the average increase of infestation of all vegetation by the mold, and the degree of humidity which must result. Then, having checked and counterchecked, at last he was ready to read his paper and give his conclusions at a joint meeting of the plant men and the weathermen.

Just before Sersen went up to the platform, he turned to Charles. “I'm ready now to face the music,” he said, “because I believe we are up against something which makes scientific respectability nonsense. We've got to throw caution aside and tell the world.” “That's serious,” said Charles cautiously. “It's damned serious,” said Sersen, and went up the steps to the rostrum.

When he came down, the audience was serious too; for a moment, as serious as he. He had begun by showing the world map with its spreading, dated lines showing where the mildew in its present profusion had reached; showing also where, in a couple of months, the two sides of the ripple would meet. Soon, almost every tree and shrub throughout the world would be infested, and, of course, the number of molds per tree and bush would increase. That was interesting and queer, but of no popular concern. The molds still remained harmless to their tree hosts and to animal life—indeed, some insects seemed rather happy about the botanical change. As far, then, as the change was only a change in mildew reproduction there was no cause for much concern, still less for alarm. The mold had gone ahead, because it was the first to benefit from some otherwise undetectable change in climate. The natural expectation would, then, be that insects, the host plants, or some other species of mold would in turn advance and so readjust the disturbed balance of nature.

But that was only the first part of Sersen's lecture. At that phrase, “balance of nature,” he paused. He turned from the world map with its charting of the mold's growth. For a moment he glanced at another set of statistical charts; then he seemed to change his mind and touched the buzzer. The lights went out, and the beam from the stereoptican shot down through the darkened hall. The lighted screen showed a tree; on its branches and trunk a number of red crosses had been marked. Around each cross was a large circle, so large that some of the circles intersected.

“Gentlemen,” said Sersen, “this is the discovery that really matters. Until now, perhaps unwisely, I have hesitated to communicate it. That the mold spreads, you know. That it is particularly sensitive to some otherwise undetected change in the weather, you know. Now, you must know a third fact about it—it is a weather
creator
. Literally, it can brew a climate of its own.

“I have proved that in each of these circles—and I am sure they are spreading circles—the mold is going far to create its own peculiar atmosphere—a curiously high and stable humidity. The statistically arranged readings which I have prepared, and which I have here, permit, I believe, of no other conclusion. I would also add that I believe we can see why this has happened. It is now clear what permitted this unprecedented change to get under way. We have pulled the trigger that has fired this mine. No doubt the mold first began to increase because a slight change in humidity helped it. But now it is—how shall I put it—co-operating. It is
making the humidity increase
.

“There has probably been present, these past few years, one of those small increases in atmospheric humidity which occur periodically. In itself, it would have made no difference to our lives and, indeed, would have passed unperceived. But it was at this meteorological moment that European scientists began to succeed in making a new kind of quick-growing mold which could create fats. It is, perhaps, the most remarkable of all the war efforts, perhaps the most powerful of all the new defensive weapons—against a human enemy. But in regard to the extra human world in which we live it may prove as dangerous as a naked flame in a mine chamber filled with firedamp. For, need I remind you, molds are spore-reproducing growths. Fungus is by far the strongest form of life. It breeds incessantly and will grow under conditions no other form of life will endure. When you play with spore life you may at any moment let loose something the sheer power of which makes dynamite look like a damp squib. I believe what man has now done is precisely that—he has let the genie out of its bottle, and we may find ourselves utterly helpless before it.”

Sersen paused. The lights came on. Dr. Charles rose and caught the chairman's eye. Dr. Charles begged to state on behalf of the botanical world that he hoped Dr. Sersen's dramatic remarks would not be taken gravely by the press or the public. Dr. Sersen had spoken of matters botanical. Dr. Charles wished to say that he and his colleagues had had the mildew under protracted observation. He could declare categorically that it was not dangerous.

Sersen had not left the platform. He strode back to the rostrum. “I am not speaking as a botanist,” he exclaimed, “I am speaking as a meteorologist. I have told you of what I am sure—the balance of life has been upset. You take for granted that the only balance is life against life, animal against animal, vegetable against vegetable. You were right to call in a weatherman, but that's of no use unless you understand what he is telling you.”

The audience shifted offendedly in its seats. It wasn't scientific to be as urgent as all that. Besides, hadn't Charles said there was no danger? But what was their queer guest now saying?

“I know, every meteorologist knows, that this nature-balance is far vaster and more delicately poised than you choose to suspect. All life is balanced against its environment. Cyclones are brought on, climate can change, a glacial age can begin as the result of atmospheric alterations far too small for the layman to notice. In our atmosphere, that wonderful veil and web under which we are sheltered and in which we grow, we have a condition of extraordinary delicacy. The right—or rather the precisely wrong—catalytic agent can send the whole thing suddenly into quite another arrangement, one which can well be desperately awkward for man. It has taken an amazing balance of forces to allow human beings to live. That's the balance you've upset. Look out.”

He studied his audience. There they sat, complacent, assured, only a little upset that an overexcitable colleague should be behaving unscientifically—hysterically, almost. Suddenly, with a shock of despair, Sersen realized that it was no use hoping to stir these learned experts. These were the actual minds which had patiently, persistently, purblindly worked the very changes which must bring the house down on their heads. They'd never asked, never wished to ask, what might be the general and ultimate effects of their burrowing. We're just another sort of termite, thought Sersen, as he looked down on the rows of plump faces and dull-ivory-colored pates. We tunnel away trying to turn everything into “consumable goods” until suddenly the whole structure of things collapses round us.

He left the rostrum, submitted to polite thanks, and went home. A week later his botanical hosts had ceased even to talk about his strange manners. Hardly anyone else heard of his speech.

The first report of trouble—or rumor rather (for such natural-history notes were far too trivial to get into the battle-crammed papers)—came from orchard growers in deep valleys. Then fruit growers began to gossip when the Imperial Valley, hot and dry as hell, began to report much the same thing. It was seen at night at the start and cleared off in the day; so it seemed no more than an odd, inconsequent little phenomenon. But if you went out at full moon you did see a queer sight. Every tree seemed to have a sort of iridescent envelope, a small white cloud or silver shroud all its own.

Of course, soon after that, the date growers had something to howl about. The dates wouldn't stand for damp—and each silver shroud was, for the tree about which it hung, a vapor bath. But the date growers, all the other growers decided, were done for anyway; they'd have made a howl in any case when the new Colorado water made the irrigation plans complete. The increase in humidity would inevitably spoil their crop when the valley became one great oasis.

The botanists didn't want to look into the matter again. Botanically, it was uninteresting. The inquiry had been officially closed. But the phenomenon continued to be noticed farther and farther afield.

The thing seemed then to reach a sort of saturation point. A new sort of precipitation took place. The cloud around each tree and bush, which now could be seen even during the day, would, at a certain moment, put out feeler-like wisps and join up with the other spreading and swelling ground clouds stretching out from the neighboring trees. Sersen, who had thrown up his official job just to keep track of this thing, described that critical night when, with a grim prophetic pleasure, he saw his forecast fulfilled before his eyes. His last moldering papers have remained just decipherable for his great-grandchildren.

“I stood,” he said, “on a rock promontory south of Salton Sea. The full moon was rising behind me and lighted the entire Valley. I could see the orchards glistening, each tree surrounded by its own cloud. It was like a gargantuan dew; each dew-globule tree-size. And then, as I watched, just like a great tide, an obliterating flood of whiteness spread over everything. The globules ran into one another until I was looking down on a solid sea of curd-white, far denser than mist or fog. It looked as firm, beautiful, and dead as the high moon which looked down on it. ‘A new Deluge,' I said to myself. ‘May I not ask who has been right? Did I not foretell its coming and did not I say that man had brought it on his own head?'”

Certainly Sersen had been justified. For, the morning after his vigil, when the sun rose, the Fog did not. It lay undisturbed, level, dazzling white as a sheet of snow-covered ice, throwing back into space every ray of heat that fell on it. The air immediately above it was crystal clear. The valley was submerged under an element that looked solid enough to be walked on. The change was evidently so complete because it was a double one, a sudden reciprocal process. All the damp had been gathered below the Fog's surface, a surface as distinct as the surface of water. Conversely, all the cloud, mist, and aqueous vapor in the air above the Fog was evidently drained out of it by this new dense atmosphere. It was as though the old atmosphere had been milk. The mold acted as a kind of rennet, and so, instead of milk, there remained only this hard curd and the clear whey. The sky above the Fog was not so much the deepest of blues—it was almost a livid black; the sun in it was an intense, harsh white and most of the big stars were visible throughout the day. So, outside the Fog it was desperately cold. At night it was agonizingly so. Under that cold the Fog lay packed dense like a frozen drift of snow.

Beneath the surface of the Fog, conditions were even stranger. Passing into it was like going suddenly into night. All lights had to be kept on all day. But they were not much use. As in a bad old-fashioned fog, but now to a far worse degree, the lights would not penetrate the air. For instance, the rays of a car's headlights formed a three-foot cone, the base of which looked like a circular patch of light thrown on an opaque white screen. It was possible to move about in the Fog, but only at a slow walking pace—otherwise you kept running into things. It was a matter of groping about, with objects suddenly looming up at you—the kind of world in which a severe myopic case must live if he loses his spectacles.

Soon, of course, people began to notice with dismay the Fog's effect on crops and gardens, on houses and goods. Nothing was ever again dry. Objects did not become saturated, but they were, if at all absorbent, thoroughly damp. Paper molded, wood rotted, iron rusted. But concrete, glass, pottery, all stone ware and ceramics remained unaffected. Cloth, too, served adequately, provided the wearer could stand its never being dry.

The first thought in the areas which had been first attacked was, naturally, to move out. But the Fog moved too. Every night some big valley area suddenly “went over.” The tree fog around each tree would billow outward, join up with all its fellows, and so make a solid front and surface. Then came the turn for each fog-submerged valley, each fog-lake, to link with those adjacent to it. The general level of these lakes then rose. Instead of there being, as until now, large flooded areas of lowland, but still, in the main, areas of clear upland, this order was now reversed. The mountain ranges had become strings of islands which emerged from a shining ocean that covered the whole earth's surface, right up to the six-thousand-foot level.

Any further hope of air travel was extinguished. In the Fog, lack of visibility, of course, made it impossible. Above the Fog, you could see to the earth's edge: the horizons, cleared of every modulation of mist, seemed so close that you would have thought you could have touched them with your hand. As far as sight was concerned, above the Fog, near and far seemed one. But even if men could have lived in that thin air and “unscreened” light, no plane could be sustained by it.

Sea travel was hardly more open. True, the surface of the oceans lay under the Fog-blanket, as still as the water, a thousand fathoms down. But on that oily surface—that utterly featureless desert of motionless water—peering man, only a few yards from the shore, completely lost his way. Neither sun nor stars ever again appeared over the sea to give him his bearings. So man soon abandoned the sea beyond the closest inshore shallows. Even if he could have seen his way over the ocean, he could not have taken it. There was never a breath of wind to fill a sail, and the fumes from any steamship or motorboat would have hung around the vessel and would have almost suffocated the crew.

Retreat upward was cut off. For when the Fog stabilized at six thousand feet, it was no use thinking of attempting to live above it. Even if the limited areas could have given footing, let alone feeding, to the fugitive populations, no hope lay in that direction. For the cold was now so intense above the Fog that no plant would grow. And, worse, it was soon found, to the cost of those who ventured out there, that through this unscreened air—air which was so thin that it could scarcely be breathed—came also such intense ultraviolet radiations from the sun and outer space that a short exposure to them was fatal.