World population continues to grow. The latest UN projections, released this week, indicate that we will add another 2 billion people to the planet by 2050 and 3 billion by the end of the century.  While population growth is ebbing in many countries—and even starting to contract in a few—population growth in some countries remains brisk, if not breakneck. 

In 1990, the U.S. Congress passed the Global Change Research Act “to assist the Nation and the world to understand, assess, predict, and respond to human-induced and natural processes of global change.” Under this mandate, the U.S. Global Change Research Program (USGCRP) was born, an innovative, cross-cutting research initiative that brings together the science arms of 13 federal agencies working on global change issues, including the Departments of Agriculture, Interior, Energy, Defense, the Environmental Protection Agency, the National Oceanic and Atmospheric Administration, and others.

The Paris Climate Agreement sets forth a bold goal to reduce greenhouse gas emissions, keep global temperature rise below 2.0 degrees Celsius, and employ best efforts toward no more than 1.5 degrees of warming. It also sets forth a new set of rules to achieve these goals. [Video Below]

In December 2015, representatives from 195 nations gathered in Paris for the 21^st Conference of the Parties (COP-21) to the UN Framework Convention on Climate Change. After two weeks of intensive negotiations, countries approved an agreement that charts new territory for global cooperation to address climate change. [Video Below]

In the course of development, most countries undergo a demographic transition. Health conditions improve and mortality rates decline, causing rapid population growth and a relatively high proportion of young people. Over time, if fertility declines, as it has in most places, growth slows and there is a period when the proportion of very young “dependents” shrinks in comparison to the working age population. This moment represents an opportunity for a “demographic dividend” – an economic boom as a comparatively large cohort of the total population moves through their most economically productive years. [Video Below]

Global climate trends indicate that our planet will continue warming into the next century, leading to more extreme climate conditions. The Latin America and Caribbean region is vulnerable to some of the most challenging aspects of climate change – sea-level rise, changes in precipitation, glacial melting, spreading of disease, and extreme weather events.

In his 2007 best-seller, The World Without Us, Alan Weisman explored what would happen to the planet if the human race suddenly vanished – the gradual deterioration of the built environment, the geologic fossilization of our everyday stuff, and the ecological processes that would rebound and thrive without continual and growing human pressure. [Video Below]