Perovskites are excellent light absorbers. Even better than the previous champion gallium arsenide, which in turn is much better than the most popular silicon. 
The UE member states have finally approved new regulations on creating a stability reserve for the EU CO2 emissions allowances market. 

The increasing problem of traffic jams in agglomerations cannot be completely tackled. It would require an endless expansion of road infrastructure, what is, obviously, impossible. The increasing number of cars requires solutions which would diminish the scale of the problem.