Mammals first appeared during the <span>Mesozoic </span>era.Hope I helped, good luck!'
Decreases? I think.........
Burning is any fire intentionally ignited to meet specific land management objectives, such as to reduce flammable fuels, restore ecosystem health, recycle nutrients, or prepare an area for new trees or vegetation
The biggest doubling time of all the regions/continents in the world has Europe.
Europe is the only continent that has almost 0% population growth (as of 2014), which practically means that with this pace Europe will need an eternity to be able to double its population, so it makes it the continent with the biggest time needed to double it's population.
