When I was a graduate student at the University of Kansas, the pesticide DDT was very much on my mind. My assistantship in 1953 involved research on the evolution of DDT-resistance in fruit flies. It quickly became clear to all of us in this research group that the broadcast use of pesticides was a losing and dangerous game. When I attempted to raise butterflies in New Jersey in the 1940s, bringing food plants in from nature usually resulted in the caterpillars dying. In those days, widespread spraying of DDT to control mosquitoes coated much of the countryside with poison. In the lab it was easy to use selection to make flies impervious to DDT in some 10 generations, or, in contrast, so susceptible that they would drop dead at a whisper of that “miracle” chemical’s name. Evolution of resistance tended to make continuous use of any pesticide inefficient. The usual response of the chemical industry was to recommend increasing the dose or to substitute more toxic compounds, making pest control even more expensive and dangerous.
The Great Debate
The 1992 Earth Summit in Rio was marked by optimism and hope, but much of the buzz about the upcoming Rio+20 meeting is skeptical and cynical. Critics say the Rio process has been unduly bureaucratic and hasn’t lived up to its goals. They are branding Rio+20 as a failure before it has even begun. President Obama and Prime Minister Cameron are sitting it out. Some even say that in the radically decentralized Internet Age, the days when government leaders or U.N. bodies can set global agendas by fiat are long gone.
If it were a novel, people would criticize the plot for being too far-fetched – thriving colonies disappear overnight without leaving a trace, the bodies of the victims are never found. Only in this case, it’s not fiction: It’s what’s happening to fully a third of commercial beehives, over a million colonies every year. Seemingly healthy communities fly off never to return. The queen bee and mother of the hive is abandoned to starve and die.
If you’ve been outside recently, you probably realize that this summer is hot. With the latest heat wave now spreading across the country, it’s worth pointing out that many Americans are unknowingly contributing to the soaring temperatures. How? Millions of rooftops in America are made of black tar; and they absorb and trap an enormous amount of heat during the summer months. It’s also worth pointing out that there’s an easy fix to the black roofs problem that people of all political stripes can get behind: paint the black roofs white.
By Danielle Grace Warren
The opinions expressed are her own.
The people of Haiti have a name for the earthquake that rocked their country: Goudougoudou, an onomatopoetic creole nickname invented for the earthquake meant to emulate the sound of the earth rumbling, the buildings falling. There are numbers for it, too: 230,000 deaths, 59 aftershocks and 1.5 million people who remain displaced nearly a year later.
Joschka Fischer was never one to mince words when he was Germany's foreign minister in the late '90s and early noughts. So it is not overly surprising that he has painted a picture in a new post of a world with only two powers -- the United States and China -- and an ineffective and divided Europe on the sidelines.
The following is a guest post by Mark Davis, a senior research fellow and director of the Tulane Institute on Water Resources Law and Policy at Tulane Law School. The opinions expressed are his own.
from The Great Debate UK:
-Lord Julian Hunt is visiting Professor at Delft University, and former Director-General of the UK Met Office. The opinions expressed are his own.-