By Dmitry Solovyov

MOSCOW (Reuters) - A fuel oil spill from a Russian tanker into the Black Sea is killing dolphins and the nearby Sea of Azov may suffer heavy pollution if urgent measures are not taken, Russia's environment watchdog said on Thursday.

Commercial Fishing and Climate Change May Soon Cause Extinction

PUNTARENAS, Costa Rica (Reuters) - Endangered sea turtles accidentally caught by fishermen off Latin American coasts usually die but innovative hooks that are too big to swallow are increasingly saving the reptiles' lives.

WASHINGTON (Reuters) - The Mississippi River, storied in American culture and commerce, needs more federal government action if it is once again to be clean enough for fishing and swimming, scientists said on Tuesday.

In a report issued by the National Research Council, the scientists called on the Environmental Protection Agency to take a more aggressive role in enforcing the Clean Water Act, which aims to make U.S. waters "fishable and swimmable."

ROGERS, Arkansas (Reuters) - President George W. Bush said on Monday his administration's approach of emphasizing voluntary approaches to address climate change was working and he denounced Kyoto-style mandatory caps as "bad policy."

OSLO (Reuters) - Awarding the Nobel Peace Prize to former Vice President Al Gore and the U.N. climate panel widens a definition of peacemaking and will raise pressure for the world to agree a new deal to combat global warming.

MARSEILLE, France (Reuters) - A French explorer unveiled plans on Friday to fly over the Arctic in an airship to measure the ice cap amid concern at the pace it is melting.

Jean-Louis Etienne (www.jeanlouisetienne.fr) said his 10,000 kilometer (6,214 mile) journey will serve as a benchmark for monitoring the impact of global warming on the North Pole.

BLOOMINGTON, Ind. -- A study by an Indiana University environmental science professor and several colleagues suggests a widely planted variety of genetically engineered corn has the potential to harm aquatic ecosystems. The study is being published this week by the journal Proceedings of the National Academies of Sciences.

A team of MIT students, faculty and volunteers has taken on the challenge of designing and building a house that relies entirely on solar energy to meet the electricity needs of a typical American family, from drying towels to cooking dinner.

MIAMI - Americans do not need to pare back their lifestyles to help protect the global environment but may need to use sugar or orange peel to power their energy-guzzling Hummers and Cigarette boats, Florida's governor said on Tuesday.