Question

questions #8 - 10 refer to the following graphs: electricity production by source, united states

1. since 1990, which type(s) of energies have decreased the most? and why?
2. since 1990, which type(s) of energies have increased the most? and why?
3. are these trends heading in the right direction? why or why not. explain your reasoning.

Explanation:

Step1: Analyze the upper graph for decreasing energy types

Examine the electricity - production - by - source graph from 1990 to 2022. Coal shows a significant decline as its share and total production decrease over the period due to environmental regulations and the rise of alternative energy sources.

Step2: Analyze the upper graph for increasing energy types

Natural gas and renewable energy sources (such as wind and solar) show increases. Natural gas has increased due to its relatively lower carbon emissions compared to coal and its abundance. Renewables have grown because of technological advancements, government incentives, and a push for clean energy.

Step3: Analyze trends for question 10

The trends overall seem to be heading in a positive direction in terms of a shift towards cleaner energy sources. The decrease in coal and increase in renewables and natural gas are steps towards a more sustainable energy future, reducing carbon emissions and reliance on fossil fuels.

Answer:

1. Coal has decreased the most since 1990. This is due to environmental regulations limiting its use and the emergence of cleaner energy alternatives.
2. Natural gas and renewable energy sources (like wind and solar) have increased the most. Natural gas because of its lower - carbon nature and abundance, and renewables due to technological progress and government support.
3. The trends are generally heading in a positive direction as there is a shift away from high - carbon coal towards cleaner natural gas and renewable energy sources, which is beneficial for environmental sustainability.