Methodist ministers Don Baldwin and Sharon Delgado say the deterioration of the planet - including global warming, declining air quality and water pollution - is a moral issue as well as a physical issue.

"We really are at a critical time in the history of the earth when we have so many different challenges," Baldwin said.

The two local spiritual leaders organized Sunday afternoon's second annual slideshow and discussion at the Nevada City United Methodist Church addressing issues that impact the earth.

Sunday's event was one of several local activities planned in the weeks surrounding Earth Day, Tuesday.

This year's well-attended event was titled "Sacred Planet, Living Water," and focused on water pollution and conservation.

"A gift of God that is basic to all of life," is water, Delgado said in her sermon at the church Sunday morning. "Our bodies are over 90 percent water. Water flows through our bodies and connects us with all of life."

People of all ages milled about the halls of the church during a free noon soup lunch, viewing displays and collecting brochures on water treatment technologies, water conservation, water filters, rainwater collection and the effect of global warming on the earth's water supply.

At 1 p.m., Baldwin presented his slideshow, "Sacred Shoreline," to a packed audience.

"The shoreline is where we can experience life in our souls," Baldwin said. "It is a meeting place. It's where my wife and I had our honeymoon. It's where people cast ashes into the sea. It's where we're aware of the cycles, the ebb and flow of life."

Other upcoming Earth Day events include a celebration of John Muir's 170th birthday from 7 to 9 p.m. tonight at the Miners Foundry. Admission is free.

At 3 p.m. April 26, Tahoe Truckee Earth Day will be held at the village at Squaw Valley with a push pedal pull eco-parade, Haute Trash Fashion Show, kids' performances and live music.