Despite the availability of cleaner energy sources, most of the energy used to power american homes comes from the burning of fossil fuels such as coal and oil. the burning of fossil fuels releases carbon dioxide into the air. carbon dioxide is a greenhouse gas that contributes to climate change. why do you think it’s a challenge to reduce fossil fuel usage in homes in the united states? how could the use of fossil fuels affect the biodiversity in neighborhoods and the surrounding ecosystems?

It is and will be a challenge to reduce the consumption of fossil fuels, not only in te US, since these are the most popular, afordable and available sources of energy.

Excess CO2 is really harmful to our ecosystems, specially because the emission of Carbon dioxide increases temperature which is not good news to already hot environments and environments that are not used to a high temperature.

Hope it helped,

BioTeacher101

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

c. live where it’s cold and icy