Select all the correct answers. Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells?
Burning fossil fuels contributes to climate change.
Burning fossil fuels takes place inside expensive fuel cells.
Fossil fuels aren’t widely available, but pure hydrogen is.
Fossil fuels are nonrenewable.

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

What element does susan b. anthony include in this passage to strengthen her argument?

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey