Worldwide, coca-cola and pepsicola dominate the soft-drink market, selling significantly more beverage products than any other producers. this domination by only two producers is best described as a(n)

The oligopoly  

Explanation:  since among all the soda producers, coca-cola and pesi cola dominate the market, this kind of market structure can be described as oligopoly. Oligopoly is when the market is controlled by a small number of firms,  none of which can keep the others from having significant influence

The two firms control the majority of the market share therefore it can be said, they are in an oligopolistic market .

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.