I still do not understand why we don't have people on the streets every single day raising their voices for climate.

When you have a vision of where you need to go, it sounds utopian. But when you get to the tipping point, your understanding switches.

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It is critical that the world captures every last bit of energy efficiency, if we are to reduce greenhouse gas emissions enough to keep below dangerous rises in temperature. I am pleased that this important new study shows how information and communication technology can play an essential role in saving energy. Now we need more and effective government policies that reward such action and penalize delayed responses.

I still do not understand why we don't have people on the streets every single day raising their voices for climate.

The fact that solar has gone down 80 percent since 2008 is astonishing. Wind is perhaps not coming down as quickly. Lack of storage - batteries - is a bottleneck. That makes it very difficult to put large amounts of renewable energy on the grid.

We are just about to cross the 400 parts per million threshold.