Identify examples of how humans affect the levels of carbon dioxide in the air.

humans affect the levels of carbon dioxide in the air is by us humans using buring fossil fuels releases a chemical into the atmosphere reducing the amount of force cover and the rapid expansion of farming developing and and

industrial activities Are the least ink carbon dioxide into the atmosphere and changing the balance of the climate system

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

the index of refraction of the second medium is higher. i just took the test trust me !