Carbon dioxide is a greenhouse gas that helps to trap heat in Earth's atmosphere. We need some CO2 in the atmosphere to maintain a warm planet, but excess
carbon can cause considerable warming of the planet.
B. What percentage decrease in fossil fuel usage is required to achieve this goal?

Further decrease fossil fuel consumption to 80 percent below current levels by 2050.

Explanation:

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: