This young lady is a really great speaker ...

2.7 Degrees Warming is Madness - Greta Thunberg
https://www.youtube.com/watch?v=KKt-S0J6r6w

This climate thing is not something we should be bickering about.
Already the average heat of all parts of the Earth is increasing,
and if you have ever taken a physics class you know about the
the latent heat of fusion, meaning that ice has to such in a certain
amount of heat before it changes state to water.

Think of all that ice like ice cubes in a glass, a glass that is
sitting in the sun or a glass that has a hair dryer turned on and
aimed at it. Nothing happens at first -- the liquid in the glass
seems to stay at the same cool temperature for a long time as
the ice absorbs heat and absorbs more heat, but at a certain
point it starts to melt.

Think about what this means. It means that we have created a
situation where heat is coming into the planet, like that glass,
and has been warming up the ice, instead of warming up the
planet, even though we are warming up the planet slowly.

When there is less ice there is less capacity to warm our drink,
and the liquid starts to heat up. That is us, that is our atmosphere
that has to accept the heat that all that ice use to absorb.

That is why when you have an ice cube in your glass after it melts
the drink gets so warm so quickly. When we get rid of half the ice
the other half that is left has to absorb twice the heat it used to,
and then when half of that ice is gone the rest of the ice has to
absorb 4 times the heat ... and when all of the ice is gone the
air, the land and the sea have to take that heat and conduct it
around the planet, and we will have planetary destruction on the
scale we have not even seen yet in movies.

This is a really simple concept and experiment, and there is really
no arguing with it. We are heating up the planet, but more than
that it is like we are approaching a red danger zone that we do
not really know what it will do but we do know that heat has to
go somewhere, and that our entire planet is sensitive at the local
levels to just 1 or 2 degrees fahrenheit.

Anyone who denies this or tries to make excuses or delays it so
they can line up their capital and profit from it at the expense of
everyone else is a truly evil defective person and they need to be
gotten out of the way ... intellectually by learning, politically by
being removed from power, and finally physically when they refuse
to commit with the rest of the world to fix this problem.