Ayuda por favor:3

What border separates sonora and chihuahua national border state border physical boundary natural boundary

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes.b. it burns more cleanly than crude oil products.c. scientists have developed new ways of extracting it.d. during its extraction, groundwater can be contaminated.

Some of the incoming solar radiation is absorbed by the floor. identify the type of electromagnetic energy reradiated by the floor