Final answer:
Solar power and wind power have notably increased in electricity generation in the last decade, with solar converting sunlight and wind using windmills to produce electricity. Hydropower also grew but to a lesser extent. Despite their growth, these alternative sources still represent a small fraction of the world's total energy needs. C) Hydropower
Step-by-step explanation:
When examining the notable increase in electricity generation from alternative energy sources in the last decade, it's clear that all of the following options have experienced growth:
- Solar power
- Wind power
- Hydropower
Specifically, solar power and wind power are alternative energy sources that have seen an exponential increase in their use for electricity generation over the past ten years. Solar panels, which convert sunlight into electricity, and wind power, which transforms wind energy into electrical power using windmills, have both grown significantly in capacity and geographical distribution. Despite this, they still make up a smaller fraction of the world's total energy needs compared to traditional biomass and hydropower.
Hydropower, while it is an established technology, has also seen growth in capacity. However, the developments in solar and wind power generation are especially noteworthy, even though they still represent only a small percentage of the total energy mix. Ultimately, the large potential and improved technology in solar power and the consistent increases in wind power capacity make these two sources important players in the future of renewable energy.