Biosphere 2, Arizona, USA
Oaxaca Ethnobotanical Garden, Mexico
Biosphere 2 candidates
Sleeping Bear Dunes, Michigan, USA
Carlsbad Caverns, New Mexico, USA
Threshing wheat in Biosphere 2
Orchid nursery gardens, Hawaii
Biosphere 2 crew member with historic biospheres
East of Taiwan
Environmental kayak tour of Louisiana swamp, USA
Petrified forest, Arizona, US
Skogafoss waterfall, Iceland
Cityscape
Outdoor
Taipei Area
Lower Navajo Falls, Arizona, USA
General Sherman, Giant Sequoia tree
Okefenokee National Wildlife Refuge, USA
Chihuahuan Desert Research Institute, USA
Landscape
Hiking trail in the Colorado Rockies
The Scenery
Bandelier National Monument, USA
Nitrogen pollution experiment
Badlands National Park in winter, USA
Offshore oil drilling rig museum, Louisiana, USA
Louvre pyramids and buildings
Keukenhof Gardens, Netherlands
Winter mule train in the Grand Canyon
Hikers in the Grand Canyon
Removing invasive tamarisks from Dolores River, USA
Guadalupe Mountains National Park, Texas, USA
Yellowstone National Park, USA
White sandstone, Arizona, USA
England, London, Richmond, Royal Botanic Gardens Kew, Visitors Walking in The Palm House
Nature Environment
Global biosphere, annual cycle
Glenwood Canyon in winter, Colorado, USA
Cliffs Shaft Mine Museum, Michigan, USA
North of Taiwan
Japan, Okinawa, Ocean Expo Park, Whaleshark in the Churaumi Aquarium
A mineral water pool at Hierve el Agua, Mexico.
Travertine mineral formations at Hierve el Agua, Mexico.
Conserve water sign, USA
Arles Archaeology museum, France
The Beach
Kinmen & Matsu
Thongweed (Himanthalia elongata)
Transportation
University food waste composting program, Tucson, USA
Giant soap film
Recycling centre, Michigan, USA
Natural View
Japan
Beijing
Red palm weevil research
England, London, Trafalgar Square, The National Portrait Gallery, Female Visitor Looking at Artworks
England, London, Southwark, Bankside, Tate Modern Art Gallery, Female Visitor Looking at Artwork
England, London, Southwark, Bankside, Tate Modern Art Gallery, Female Visitor Looking at Photographic Exhibition
Testing a water sample
Badwater Basin, Death Valley
Mnajdra temple visitors, Malta
Street photographer, 1940s
Yosemite Valley tourism, 1900s
Power station tour
Craters of the Moon landscape
Craters of the Moon walking tour