Subsistence farmers are threatened by the increasing use of genetically modified crops because these crops... deplete the soil faster than selectively bred crops, resulting in desertification and displacement

can easily be grown organically, resulting in a decrease in demand for nonorganic foods

reduce the nutritional value of foods, resulting in increased malnutrition
make land more profitable to use, resulting in eviction by landlords who want to profit from the land

require less labor to cultivate, resulting in a shift of the agricultural workforce into industrial labor

Ba rock that formed 1,400 million years ago!

A. it is created from magma. the agents of a metamorphic rock is heat and pressure. (heat from intrusion of magma or burial)

The reason why i feel that the theory of plate tectonics is correct because scientists have found dinosaur bones of the same species in africa, asia, and in the americas. which means that they must have been together at one point in time. plate tectonics is also how the hawaiian islands were formed. as the plate hawaii is on was moving north west, magma would melt through the sea bottom and hardening. forming into the island chain. plate tectonics also explains the mariana trench. two plates were moving away from each other and made a giant crack in the ocean floor running 2,550 kilometers (1,500 miles)  long.