Our picks for the week of March 7-13: 

• Dolphins won an Oscar this week, or more accurately, the dolphin documentary The Cove won, and now the concept is headed to television. Also in this week's Hollywood round-up: Forest Whitaker and Bret Michaels.

• Media Mayhem tackles the winds of war: Will the hoopla over U.S. clean energy funds going to foreign countries lead to protectionism?

• Here's something to ponder: 9 not-so-crazy ideas for combating climate change.

• Our car blogger is always ahead of the story. He writes about new sensors from Mercedes-Benz that help cars predict and avoid accidents.

• Need items for the house? Go shopping for used kitchen and home goods with The Thrifty Chicks and meet Ms. Shopping Golightly (pictured.)

• While were still talking about home habits, here are 10 things you need to know about recycling.

• Don't miss this week's book review: The Immortal Life of Henrietta Lacks, about the woman whose cells helped develop the polio vaccine and medications for most illnesses treatable today.

• Today's quick knowledge test: 11 things you thought were green — but there's a catch.

• How can I help my dog enjoy the golden years? Our expert helps a reader with an older pooch.

• It's always good to end on a high note, and here's a really tall one: Check out the world's 7 most amazing trees.

Plus: This week's snapshot gallery reveals the first signs of spring, including a beautiful field of cole flowers in China. 

MNN week in review: Amazing trees and creative climate change solutions
Catch up on the environmental headlines from Mother Nature Network from the week of March 7-13.