Global warming is believed by
some to be melting the polar ice caps, thereby increasing sea levels. But
according to a 1998 study by the Society of Economic Paleontologists and
Mineralologists the current sea levels are lower today than at any time in the
past 30 million years. There also is evidence
that elevated CO[2] levels
are reversible. During the middle Cretaceous era some 90 million to 110
million years ago, large portions of all continents were submerged below shallow
seas, and the atmosphere was abnormally high in carbon dioxide (CO[2]). The
oceans mitigated the CO[2] with an explosion of single-cell organisms (coccolithophores)
that extracted the gas from the atmosphere and formed massive deposits of chalk
— the White Cliffs of Dover, for example.
Michigan fourth-graders and eighth-graders scored slightly
above the national average on the science portion of the 2005 National
Assessment of Educational Progress. On a scale of zero to 300, Michigan
fourth-graders averaged 152, compared to the national average of 149, ranking
the state 22nd in the nation. Michigan eighth-graders scored 155, compared
to the national average of 147, ranking the state 15th in the nation. According
to the National Center for Education Statistics, only about 32 percent of U.S.
fourth-graders and 35 percent of U.S. eighth-graders were "proficient" on the
2005 science test. For more information, go to
http://nationsreportcard.gov/science_2005/.
About 10,000 computers used by the federal government join the waste stream every week, according to the U.S. Environmental Protection Agency.
Learn more at
www.epa.gov/oamhpod1/admin_placement/0300115/fact.htm.
Lakes Huron, Ontario, Michigan, Erie and Superior contain about 6
quadrillion gallons of water. According to the Great Lakes Information Network,
the lakes account for 20 percent of the world’s fresh surface water, and if all
that H[2]O were spread across the continental United States, we would be 9.5 feet underwater. More numbers are available at
www.great-lakes.net/lakes/ref/lakefact.html.
