U.S. Greenhouse Gas Emissions. In the United States, greenhouse gas emissions caused by human activities increased by 7 percent from 1990 to 2014. Since 2005, however, total U.S. greenhouse gas emissions have decreased by 7 percent. Carbon dioxide accounts for most of the nationâs emissions and most of the increase since 1990. Electricity generation is the largest source of greenhouse gas emissions in the United States, followed by transportation.
The phylum Arthropoda (jointed foot) has the largest number of species. In fact, about 85 percent of known species are arthropods, and insects alone make up about 75 percent of known species. Other arthropods include the centipedes and millipedes; the arachnids (spiders, scorpions, ticks, mites); and the crustaceans (barnacles, crabs, crayfish, lobsters, shrimp, water fleas). Obviously,
At the seashore animals will be from the Animal Kingdom in these phyla. 1  Phylum: Mollusks (Soft-bodied animals that sometimes have a hard shell. 2  Includes: snails, octopus, squid, clams, oysters, and mussels.).3  Phylum: Echinoderms (Often spiny animals, with several arms reaching out from the center of its body. Includes: starfish, sea cucumbers and sea urchins.). 2  Phylum: Arthropods, SubPhylum: Crustaceans. 3  Crabs, lobsters, shrimp, barnacles and many other animals belong to the phylum arthropods. 4  In fact, 75% of all animals belong to the phylum arthropoda (which also includes spiders and insects).