No golfer's journey is complete without a pilgrimage to St. Andrews, the mecca of the game. This is where it all began, back in the 15th and 16th centuries.

According to the U.N., more than 2.7 billion people will face severe water shortages by 2025. Many social scientists predict that the next big wars will be over water. Nevertheless, the average American family blissfully consumes 300 gallons a day, when you add in watering the lawn and washing dishes, clothes, and cars.

Before you rip off three feet of toilet paper, consider that each year 500,000 acres of virgin boreal forest in northern Alberta and Ontario are being clear-cut to make the stuff. These forests are home to some 500 First Nation communities, as well as caribou and bears, moose and wolves, and, in the summertime, billions of songbirds.

If the world were an orange with 18 segments meeting at the top (the North Pole), roughly 8 of them would be in Russia, Canada would have 4, Denmark 2, and Norway, Sweden, and the U.S. just one apiece. Only a sliver of Alaska, on the Beaufort Sea, lies above the Arctic Circle.

Trump has got to be one of the most branded people on the planet. You can't get away from him.

The day we dispose of the idea of disposability will be a great one for the planet.

Nature got it right with the cranes. They have been around since the Eocene, which ended 34 million years ago.

In my travels, I have encountered cranes on three continents.

The usual way of growing cotton is highly petrochemical-intensive, requiring 110 pounds of nitrogen fertilizer per acre. Some of the fertilizer is broken down by soil bacteria into nitrate, a toxic and highly soluble chemical that can leach into groundwater or get washed into lakes, creating oxygenless dead zones.

The plumbing and pluvial dynamics of the Amazon, the largest freshwater system on Earth, are still far from understood. This is partly because it is a semi-open system. Moisture flows in and out unpredictably. A lot of nonlinear feedback loops and 'remote influences' - continental, transcontinental, oceanic, meteorological - come into play.