Which layers is earth has convention currents?

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

it creates acid rain