400
Sources of Matter
What is
ROCKS, MINERALS, ORES (metals, salt, tums, anything considered a compound)
SALT/FRESH WATER (water, salt and minerals, hydrogen/oxygen)
AIR (nitrogen, argon [light bulbs], oxygen)
ORGANIC [PLANTS + ANIMALS] (food, fuels, fibers, wood, ect.)
OIL/PETROLEUM (plastic, everything in organic except nutrients)