What we learned this week

Kenya is the latest country to sign over millions of hectares of land to Dubai as part of its massive African land-grab. It joins Liberia, Tanzania, Zambia and Zimbabwe – with the latter signing over a fifth of its land without any global outcry.

David Roberts of the Volt podcast talks to Ólafur Teitur Guðnason of Carbfix, who do carbon capture and sequestration by carbonating water and putting it underground. Yes, carbonating water, like fizzy drinks.

When we’re retrofitting homes in the...