Why did the egyptians build pyramids for their pharos?

If a robot fixed another robot is it a engineer or doctor?

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

Me the formula cacl2 represents the compound