Answer:
Chemicals used to increase crop growth: fertilizers
Chemicals used to prevent insect infestation of crops: pesticides
Choosing the single most efficient crop variety for the exisiting conditions: monoculture
Planting different crops each year for healthier fields: crop rotation
Explanation:
Not fully sure i heard there was only 26 pyramids by my teacher but she wasn't fully sure.
Answer:
The United States gets 81% of its total energy from oil, coal, and natural gas, all of which are fossil fuels. We depend on those fuels to heat our homes, run our vehicles, power industry and manufacturing, and provide us with electricity.
Explanation:
Answer: Asia, And Europe .