2. In the near future, do you think deserts are likely to con-nue expanding or will deser-fica-on be contained or even reversed? Why?

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a

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compost can be added to topsoil as a:

pesticide