Approximately how deep is the ocean?

Which of the following is the most likely result of converting forestland to urban development? a.the amount of land available for lumber production decreases. b.fewer trees are needed because cities are made mainly of concrete. c.people discover more efficient ways to grow trees. d. the price of lumber goes down.

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.