The PS10 Solar Power Plant is
located in Spain. A total of 624
mirrors concentrate the Sun’s
rays onto a solar receiver on the
top of the towerAll renewable energy sources are strong
contenders for the title of ‘greenest energy
source’ since they harness carbon-neutral
sources of energy such as the Sun or wind
and don’t cause air pollution, putting them
leagues ahead of coal or gas power.
Picking a clear winner is, however, tricky.
Once you consider the emissions
associated with their manufacture and
installation, hydropower has the lowest
carbon footprint, according to one major
study. But there are also many other
environmental impacts to bear in mind.
For example, building hydropower dams
can cause disruption to river ecosystems,
while manufacturing solar panels typically
involves toxic chemicals. AC
What is the greenest
energy source?
VITAL STATS
The distance, in
kilometres, that
autonomous sub Boaty McBoatface will
travel under the
Arctic sea ice.2,