Some cool general blogs you can start reading include Goodreads Blog and the Huffington Post blogs. There are many blogs on many topics, so read the blogs that interest you.
I think there are lots of blogs about the environment. It is hard to count it. There are so many.
Blogs are personal logs or diaries. Of which there are many millions. Sites such as those suggested are not blogs in themselves but platforms for the blogs. Many people create their own platforms on their own sites.
I think there are millions of blogs online. I do not know the exact number.
Wikipedia is full of facts written by many many many users. Blogs are written by 1-5 people that the author of the post gave permission to do. Blogs you can trust because Wikipedia may have information that may not be true, blogs might, but it is a lower chance.
There are many blog directories that offer lists of blogs by categories. You can try Technorati or many others.
There are lots of bloggers in this world. In the same way also, there are lots of wordpress blogs.
There are so many kurdish blogs. But this is one of my favorite: browse " kurdistan adventures".
It is really difficult to measure because new blogs are created each day.
in the world there are more than 1 Billion + users and viewers on blogs