The planet Mars - crimson and bright, filling our telescopes with vague intimations of almost-familiar landforms - has long formed a celestial tabula rasa on which we have inscribed our planetological theories, utopian fantasies, and fears of alien invasion or ecological ruin.

David Grinspoon

'Ecological sensitivity' is not the first thing that comes to mind when you think of Donald Trump. He doesn't even believe in global warming. But this is because he is a city boy.

Alex Shoumatoff

We don't need a War on Carbon. We need a new prosperity that can be shared by all while still respecting a multitude of real ecological limits - not just atmospheric gas concentrations, but topsoil depth, water supplies, toxic chemical concentrations, and the health of ecosystems, including the diversity of life they depend upon.

Alex Steffen

Each creature both great and small has evolved after millions of years of evolution serving an integrated and important part in the ecological balance of our Earth. Upset the balance and the consequences are disastrous.

Amala Akkineni

If you look at the ecological circuitry of this planet, the ways in which materials like carbon or sulfur or phosphorous or nitrogen get cycled in ways that makes them available for our biology, the organisms that do the heavy lifting are bacteria.

Andrew H. Knoll

I think Scotland could take a stand in a wonderful way, ecologically and morally and ethically.

Annie Lennox

The populists are right in one key area: voters want jobs and equitable growth, and can hardly be faulted for that. The challenge is to find a more inclusive growth trajectory that can be sustained economically, ecologically, and politically.

Arancha Gonzalez

In California, there are huge problems because of dams. I'm against big dams, per se, because I think that they are economically unfeasible. They're ecologically unsustainable. And they're hugely undemocratic.

Arundhati Roy

If politics and business fail us, of course the military will be called in. In the developing world, the massive and repeated ecological disasters are quite commonly met by the military.

Bruce Sterling

Not only is natural burial by far the most ecologically sound way to perish, it doubles down on the fear of fragmentation and loss of control. Making the choice to be naturally buried says, 'Not only am I aware that I'm a helpless, fragmented mass of organic matter, I celebrate it. Vive la decay!'

Caitlin Doughty

Labour needs to end its support for expensive nuclear power and vanity projects like HS2, and take a firm stance against the ecologically impossible expansion of airports.

Caroline Lucas

Clearly, the oil spill in the Gulf is a terrible tragedy; we lost 11 lives on the rig, and their families are suffering, and it's also an economic tragedy for our state and ecological tragedy for the Gulf. But Sept. 11 was a different type of event: it was an intentional attack on soil.

Charles Boustany

I want to tell mayors, county chiefs and heads of big companies: don't just chase GDP growth; don't chase the biggest profits at the expense of our children and grandchildren and at the cost of sacrificing our ecological environment.

Chen Guangbiao

If you look at it ecologically, deforestation is high on the list of things which bring devastation. You cut down trees to build homes, for fuel, and you end up with no trees left, and you have to move on. If you take the earth as a whole, eventually there's nowhere to move on to.

Clive Anderson

We need the humbleness and clarity to see that our food, while benefitting from technological advances, has benefitted even more from free ecological resources: Cheap energy, lots of water everywhere, and a stable climate.

Dan Barber

If you look at the carrying capacity of agricultural areas throughout the world, their ecological habitats are changing. So I think we're looking at - in our lifetime - great collapses of food services.

Dan Barber

I'm into environmental and ecological issues, so maybe that is an avenue to go down.

Daniel Bryan

The industrial processes in use today were developed at a time when no one had to consider what the environmental impact was. Who cared? But making ecological concerns matter to a company's bottom line will help it do the research and development that will reinvent everything we buy.

Daniel Goleman

The planet Mars - crimson and bright, filling our telescopes with vague intimations of almost-familiar landforms - has long formed a celestial tabula rasa on which we have inscribed our planetological theories, utopian fantasies, and fears of alien invasion or ecological ruin.

David Grinspoon

We're shaking loose viruses and dislodging them from their natural ecological limitations, places where they aren't very abundant and have competition, even within a single animal. We introduce them into a new, rich habitat called the human population, where they can flourish more abundantly and cause more trouble.

David Quammen

Our personal consumer choices have ecological, social, and spiritual consequences. It is time to re-examine some of our deeply held notions that underlie our lifestyles.

David Suzuki