The white “bathtub ring” around Arizona’s Lake Mead (shown on May 31, 2018), which indicates falling water levels, is about 140 feet high.
AP Photo/Ross D. Franklin
Western states adopted a 7-year plan in May 2019 to manage low water levels in the Colorado River. Now they need to look farther ahead and accept that there will be less water far into the future.
Is your community’s water tainted with lead? The data might not have been reported.
Flint's highest recorded lead levels were typical for water systems that report problems. What's more, a number of cities haven't reported their lead issues.
Waves on Lake Superior crash against the Duluth, Minn. waterfront Sept. 10, 2014.
Over the past 20 years, Great Lakes water levels have gone from sustained multiyear lows to multiyear highs. Climate change is accelerating the transition between dry phases and wet phases.
Everything in an animal’s body is made out of cells. And these cells need chemicals, such as salt, in and around them to work properly. The chemical balance needs to be just right.
Alyse & Remi/flickr
Some animals, such as ghost shrimps can even cope with water that is saltier than normal seawater. It's all down to evolution.
How long has that water already been in the system?
In many municipalities, aging water infrastructure is serving fewer people than it was built to accommodate. Out of sight has meant out of mind – but resulting changes in water quality may affect safety.
Melbourne’s water supplies are running low after years of drought.
Water in Sydney is far cheaper than in Melbourne, and residents take full advantage of it.
Many people worry that even properly treated wastewater will make them ill if they wash with or drink it.
Wastewater reuse suffers from a perception problem.
A worker recycling lead in a lead acid battery recovery facility.
National Institute for Occupational Safety and Health
Lead contamination is not just a problem for Flint, Michigan. It is an issue in many regions. One epidemiologist figured out how to measure past lead exposure using treasured biological samples.
The more fuel there is for the fire to burn, the bigger the fire. Leaves, trees and grass fuel the fire.
Bushfires require three key ingredients to ignite: heat, fuel and oxygen.
Asteroids known as ‘S-type’ contain a lot more water than we thought.
New research demonstrates that the solar system is wetter than we thought.
Planetary scientists believe that Earth was formed by the conglomeration of meteorites and comets – which also brought water.
The source of water on Earth, the Moon and planets in our solar system is hotly debated. Some in the planetary science community argued that it came from asteroids and comets. Now they have proof.
Old man (possible self-portrait) and water studies, c 1508-9.
Leonardo's obsession with water flowed through his technical work, his art and his scientific ideas.
Lessons learned from the threat of Cape Town’s “Day Zero.”
Cities need to pay attention to how extreme weather events effect their resources.
Farmer-led irrigation comes in many different shapes and forms.
The green revolution: small-scale, informal irrigation is expanding in Zimbabwe and small scale farmers are leading the way.
You don’t have to quit bread, but make sure it’s wholegrain.
When it comes to weight loss, there's no such thing as a quick fix. But some foods will keep you feeling fuller for longer.
A Landsat view of Mount St. Helens in 2011.
U.S. Geological Survey
Since 2008, Landsat data has been free for the world to use, spurring new applications and scientific research. But that door could soon slam shut.
The Periodic Table of the Elements.
Hydrogen is the first element in the periodic table and essential for life on Earth. It may also be key to shifting away from fossil fuels toward clean sources of energy, but challenges remain.
Zambezi river delta, snapped by Landsat 8 in March 2018.
Satellites hundreds of miles overheard are helping scientists to predict drought, track floods and see how climate change is changing access to water resources.
Dams, like the Kariba between Zambia and Zimbabwe, regulate flow for irrigation, hydropower and water supply.
There are benefits and downsides to damming rivers.
Cenota Samula sinkhole in Yucatan, Mexico.
The effects of climate change above ground are well known, but what's happening to underground aquifers which supply most of the world's fresh water?