Which activity released the most carbon between 1750 and 2012

Making cement
Burning fossil fuel
Mining coal
Cutting down trees

answer:

i'd burning fossil fuels

silt loam

hope this

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.