The United States has already felt the effects of a changing climate [as has the long lost supercontinent of Pangaea whose breakup is no doubt the fault of the United States as well], such as Hurricane Katrina [which according to liberals was the first ever hurricane in history] and Superstorm Sandy [which according to liberals was the first ever storm to strike the East Coast], and should [because some idiot student says so,] mitigate the consequences of these disasters with the country’s abundant resources that poorer nations cannot afford [because these countries' leaders keep bleeding their people dry, selling off their country's resources to enrich themselves, and buying the people's votes with petty little gifts and unfulfilled promises].
The question of environmental reparations is a matter of ecology and humanitarianism[pure socialist wishful thinking]. A changing climate could lead to a dangerous trajectory where the fight for resources in countries no longer able to provide for their own populations engage in civil wars or genocide [or it could lead to a prosperous future with abundant plant growth and milder temperatures, lessening losses from diseases like pneumonia, there's no way to know]. If a country’s resources are not enough to maintain an entire population [because the country adopted socialism instead of capitalism], more extremist leaders would be willing to eliminate part of the population in order to have enough resources for the remaining inhabitants [which oddly enough means that Obama's own staffers are extremists since this is exactly what some of them advocated in the book "The Population Bomb."] Even if such drastic incidences are not repeated, it is undeniable that dislocated populations are often forced into war or forced to live as refugees [and it is also a fact that liberals will go to any lengths to blame dislocated populations on everything but the actual cause of dislocation]. By paying reparations, the United States [taxpayer, not the US welfare recipient] would allow poorer countries [dictators] to put in place infrastructure that may help [enrich their own pockets and the pockets of fearmongering leftists] prevent ecological catastrophes which would force populations to be dislocated in the first place. This infrastructure could include seawalls in coastal areas to prevent severe flooding and proper tools for irrigation that would help reduce the impact of drought [and unicorn ranches with skittle tree orchards] — things that, if implemented properly, could make the difference between life and death for thousands of people.
Finally, the United States [and not China] should pay reparations because it is a matter of justice [according to some liberals immoral mythical legal code] — the United States and China together account for more than a third of all CO2 emissions, and we are far behind other wealthy nations in reducing our emissions[nations who are far behind the US in producing products and ideas benefitting mankind]. Unless [unelected] international organizations like the United Nations [of food for oil scandal and Rwanda rape fame] begin to [unlawfully] financially penalize the United States [population of working citizenry] for its irresponsible actions[defiance and resistance to being robbed by ecomorons], it is unlikely that we will change our attitude. If the reparation proposals fall short, it should hardly come as a surprise to most of us. But at the very least, we must let American politicians and climate lobbyists know that their inability to take action against climate change will not go unpunished, and that those who suffer as a result shall be in some way compensated [by you and what army?].
Funny, I read it exactly like you just edited it!