Earth Day’s 48th anniversary is Sunday, April 22. The Mayor and Council issued a proclamation declaring Earth Day in Rockville during their March 19 meeting. Find video of the presentation with the March 19 listing at www.rockvillemd.gov/AgendaCenter. Rockville celebrates the season with the following activities aimed at environmental sustainability:

April 4: 5th Annual Montgomery County Energy Summit, 8 a.m.-6 p.m. in Silver Spring. Learn more at www.mcenergysummit.org.

April 12: Glenview Mansion and Peerless Rockville Speaker Series: Learn the Three B’s: Bee, Beneficial and Blooms, 7 p.m. at Glenview Mansion, 603 Edmonston Drive. Marie Rojas Marie will present. She is a master gardener and beekeeper from Beallsville, who provides integrated pest management services for homeowners, nursery growers and property managers and serves on several green industry boards. Learn more at www.peerlessrockville.org/events-and-programs.

April 14: 30th Annual Potomac River Watershed Cleanup. Stream cleanup sites include:

  • Croydon Creek Nature Center, 852 Avery Road, 9 a.m.-noon.
  • Twinbrook Community Recreation Center, 12920 Twinbrook Parkway, 9:30-11 a.m.
  • Maryvale Park, 812 First St., 10 a.m.-noon.

City staff will greet volunteers. Gloves and bags will be provided. Student Service Learning hours are available. Children under 14 must be accompanied by an adult. Bring water and wear sturdy shoes. For more information, or to register, email environment@rockvillemd.gov or call 240-314-8870.

April 22: Science Day, noon-5 p.m. at Montgomery College-Rockville, 51 Mannakee St. Visit the Croydon Creek Nature Center table. Free. Learn more at www.rockvillesciencecenter.org/rockville-science-day and in the article on page 1.

April 25: Arbor Day Ceremony. Tree-planting at 11 a.m. at Rockmead Park, 1800 Greenplace Terrace.

April 28: Prescription Drug Take-Back Day, 10 a.m.-2 p.m. at the Rockville City Police Station, 2 W. Montgomery Ave. Drive up and drop off unused or expired medications so that they are safely disposed of and kept out of our environment. For more information, contact Cpl. Ken Matney at 240-314-8922 or kmatney@rockvillemd.gov.

April 28: Spring Festival with Native Plant Sale, 10 a.m.-2 p.m. at Croydon Creek Nature Center. Bring the family to celebrate spring with a live raptor show from Scales & Tales, face painting by Kids Party Face, naturalist-led hikes, nature games and crafts and a native plant sale.

Learn how to bring an environmental speaker to your next community meeting at www.rockvillemd.gov/earthmonth and how to get involved and live greener and healthier at www.rockvillemd.gov/environment.