Environmental Organization or Group

Volunteers needed to help remove invasive plants at the 5-acre nature center located in Oak Cliff. Bring gardening tools. Workday will be cancelled if raining. info@twelvehills.org.

Volunteers needed to help remove invasive plants at the 5-acre nature center located in Oak Cliff. Bring gardening tools. Workday will be cancelled if raining. info@twelvehills.org.

Speakers to discuss the state of Texas' energy. Speakers include: Mark Armentrout, Former ERCOT chairman, CEO of Texas Technology Partners; Maria Richards, SMU Geothermal Lab Coordinator; Al Armendariz, PhD, Former Region 6 EPA Administrator, Sierra Club Texas Campaign Director; James Smith, PhD, Maguire Chair, Oil & Gas Management; and Jim Duncan, Solar Design Specialist, North Texas Renewable Energy Group. Sponsored by the Memnosyne Foundation, SMU and the Sierra Club.

Event-goers will meet birds of prey up-close, fly homing pigeons, dissect owl pellets, try out binoculars and spotting scopes, take a birding hike, create bird art and make bird feeders. Taco Party food truck will be onsite for lunch. Parking is $5. Free.

Tour hosted by the Dallas Historic Tree Coalition offers an introduction to bird watching. Birding leaders will take groups through chain of wetlands on the north side of Loop 12 after birding at Little Lemmon Lake. Wheelchair accessible. Free. info@DHTC.org

Tour hosted by the Dallas Historic Tree Coalition features panoramic view of forest river valley and historic trees from Indian and pioneer history. Free. info@DHTC.org

Dr. Fouad Jaber, asst prof and water resources mgmt specialist with Texas A&M AgriLife Extension, will discuss water conservation and alternative water sources, including rainwater harvesting, grey water and air conditioner condensate reuse. For more information, contact Kirk Miller: 972-699-1687 or KirkMiller@DallasSierraClub.org.

Fundraiser for the River Legacy Foundation featuring hors d'oeuvres, drinks, live music, animal encounters, night hikes. Benefits animal habitats and exhibits. Bid on pigeon statues. Dress: woodland chic. Cost: $100.

The North Texas Corporate Recycling Association is hosting this recycling bus tour with stops at Hilex Poly, a plastic bag recycler, and CKS Packaging, a plastic bottle recycler. Meet for lunch at Chicken Hatch at 11:30 a.m. and The Foundry beer garden for networking after the tour. No jewelry or cameras allowed; wear close-toe flat shoes. Cost: $15/NTCRA members; $20/nonmembers. Includes lunch and drink at networking event. Registration deadline Nov. 13.

DFW Ecovillage hosts a Sustainability Think Tank at 2:30 p.m. Participants are also encouraged to join the all-you-can-eat buffet from 11:30 to 2 p.m. for $10.