Many towns, including Hollis, will celebrate Earth Day on April 22, with various events to be held throughout the month.

Beaver Brook Association, an environmental education and natural resource conservation in Hollis, will host an open house at a new yurt, from 1-3 p.m., Sunday, April 22.

An almost 50-year-old nature center, Beaver Brook has some land in Brookline and Milford as well, which contains conservation land and trails.

“Though we’re a nonprofit, our property is open every day of the year, dawn to dusk, so people can come here and hike and tour the gardens, snow shoe and ski in the winter, and run,” Beaver Brook’s Celeste Barr said. “We also have a lot of educational programs – that’s part of our mission- to promote environmental education to all ages.”

Seasonal classes include full moon snowshoe hikes, fitness hiking, environmentally conscious gardening, composting, maple sugaring and parent and pre-schooler natural discovery courses, among others.

As for the yurt open house, Barr said people have been quite interested in the completion of the structure since its inception.

“They would stop by and try to peek in so I thought this would be a perfect day to have it open and people could understand how the construction of a yurt works, because it’s hard to tell from the outside how it’s suspended. But on the inside you get the whole framework which is visible,” Barr said.

The yurt also has solar panels with a converter that actuates the energy into alternating current.

Solar energy enthusiasts can also speak to a member of the Nashua Energy Options store, who is going to be on hand to answer questions and provide information.

“And we’ll have another Beaver Brook teacher available to do either crafts or hikes with families that come,” Barr said. “It’s kind of a simple open house, but it’s also a ribbon cutting event of this new energy efficient building, which is going to be used as a year round classroom.”

Beaver Brook is also promoting the Hollis Conservation Commission’s Earth Day clean-up, which will take place from 8 a.m.-1 p.m., Saturday, April 14.

“We’re hoping to get people involved in their neighborhood,” Barr said. “BB has a lot of rural frontage on Rocky Pond Road, Ridge Road and Worcester Road. Sometimes when you have uninhabited road frontages, those are good party places, so they accumulate litter over time. So we’re trying to promote that activity.”

Tom Dufresne, of the Hollis Conversation Commission, said the group has planned its Earth Day clean up a little early because of scheduling conflicts.

“People can get more information on (Beaver Brook’s) website and also on local access Channel 12 in Hollis,” he said. “And as this is our seventh or eighth year, we’re hoping for a good turn-out. Each year it seems to get a little bit better- depending on the weather.”

Dufresne said people who are interested in volunteering on April 14 can meet at the Hollis Brookline High School, where roads for clean-up will be assigned.

“Ultimately,” Barr said, “We’re just hoping that people don’t limit their energy awareness and clean up and conservation efforts to just one day. Earth day should be every day.”

For information about public events at Beaver Brook Association and the Hollis Conservation Committee, visit beaverbrook.org.