Background: Plastics have conveyed great benefits to humanity and made possible some of
the most significant advances of modern civilization in fields as diverse as medicine …

Executive summary Despite the initial hope inspired by the 2015 Paris Agreement, the world
is now dangerously close to breaching its target of limiting global multiyear mean heating to …

The pursuit of future energy systems that can meet electricity demands while supporting the
attainment of societal environment goals, including mitigating climate change and reducing …

Since the beginning of this millennium, shale gas extraction by horizontal drilling and
hydraulic fracturing has boosted US gas production, changing the global energy markets …

Extraction of natural gas from shale rock in the United States (US) is one of the landmark
events in the 21st century. The combination of horizontal drilling and hydraulic fracturing can …

The hydrocarbon resources of shale gas and tight oil have made a significant impact on
North American energy reserves over the past decade. The production of so-called …

The rapid increase in unconventional natural gas (UNG) development in the United States
during the past decade has brought wells and related infrastructure closer to population …

Directional drilling and hydraulic-fracturing technologies are dramatically increasing natural-
gas extraction. In aquifers overlying the Marcellus and Utica shale formations of …

Unconventional oil and natural gas extraction enabled by horizontal drilling and hydraulic
fracturing (fracking) is driving an economic boom, with consequences described from …

Major challenges continue to influence health promotion and health care reform as we
complete the seventh edition. Health care disparities are ongoing barriers to promoting the …