Summarizes the science of climate change and impacts on the United States, for the public and policymakers.

This text explores the natural history of Texas and more than 2900 springs in 183 Texas counties. It also includes an in-depth discussion of the general characteristics of springs - their physical and prehistoric settings, their historical significance, and their associated flora and fauna.

Today’s Greater Houston is a vast urban place. In the mid-nineteenth century, however, Houston was a small town – a dot in a vast frontier. Extant written histories of Houston largely confine themselves to the small area within the city limits of the day, leaving nearly forgotten the history of large rural areas that later fell beneath the city’s late twentieth century urban sprawl. One such area is that of upper Buffalo Bayou, extending westward from downtown Houston to Katy. European settlement here began at Piney Point in 1824, over a decade before Houston was founded. Ox wagons full of cotton traveled across a seemingly endless tallgrass prairie from the Brazos River east to Harrisburg (and later to Houston) along the San Felipe Trail, built in 1830. Also here, Texan families fled eastward during the Runaway Scrape of 1836, immigrant German settlers trekked westward to new farms along the north bank of the bayou in the 1840s, and newly freed African American families walked east toward Houston from Brazos plantations after Emancipation. Pioneer settlers operated farms, ranches and sawmills. Near present-day Shepherd Drive, Reconstruction-era cowboys assembled herds of longhorns and headed north along a southeastern branch of the Chisholm Trail. Little physical evidence remains today of this former frontier world.