We live in a swiftly changing world. Industrial and water-engineering projects, cutting of forests, plowing up of virgin lands, the use of poisonous chemicals - all such ac­tivity is changing the face of the earth, our "habitat."
Scientific study of all the interrelationships in nature and the consequences of our interference clearly lags be­hind the changes. Large amounts of harmful wastes of industry and transport are being dumped into the air and water, including cancer-inducing substances. Will the safe limit be passed everywhere, as has already happened in a number of places? (Andrei Sakharov)

We live in a swiftly changing world. Industrial and water-engineering projects, cutting of forests, plowing up of virgin lands, the use of poisonous chemicals - all such ac­tivity is changing the face of the earth, our "habitat." Scientific study of all the interrelationships in nature and the consequences of our interference clearly lags be­hind the changes. Large amounts of harmful wastes of industry and transport are being dumped into the air and water, including cancer-inducing substances. Will the safe limit be passed everywhere, as has already happened in a number of places?

Andrei Sakharov

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