Climate knowledge

How much will climate change cost?

The short answer: we can't know precisely. But, unless we change things, it will cost more than we can afford.

Climate camp

Climate Camp Week 2 - All Actions

Week 2 of Climate Camp relies heavily on data you input into our carbon calculator. We wanted to tailor every suggestion to your own carbon footprint, so you could focus on what's important for you.

Climate knowledge

Could the runaway greenhouse effect come to earth?

Get enough greenhouse gases in the atmosphere, and you set off an unstoppable feedback loop of warming. Could it happen on earth?

Climate knowledge

What does 'global warming potential' measure?

Carbon dioxide may be the most famous greenhouse gas, but it's not the only factor in climate change. "GWP" helps us compare other gases, too.

Project update

Resuming production and exciting plans for August

The August update from Clean Cooking Fuel for Refugees is here. Read on to learn more about pandemic adaptations and project milestones

Climate knowledge

What is geoengineering?

Geoengineering aims to directly manipulate the climate. It is not just mad science—though it does get plenty of people mad.

Project update

Tree count passes 19m as pandemic adaptations continue

The July update from Community Tree Planting is here. Read on to learn more about pandemic adaptations and project milestones.

Climate knowledge

What is a carbon footprint and how is it calculated?

There are various environmental "footprints" measured by researchers. So where did the idea come from, and what do those numbers really mean?

Climate knowledge

What is the carbon cycle?

Carbon, despite its bad rap, is essential—we're made from it, after all. But the trouble comes from missteps in carbon's shuffling dance, from earth to sky and back.

Project update

State of the Fund: July '20

In July, our projects continue to adapt to the ever-changing COVID-19 environment

Climate knowledge

What factors affect climate?

The climate is influenced by many different factors, but human beings have an outsized effect.

Climate knowledge

What is climate change mitigation?

The scale of climate change can be overwhelming. But there are mitigation steps we can take right now to begin to fix the problem.

Enhanced mineral weathering

Newborn piglets will help with forest development in Scotland

We've had a busy month, the highlight being that we've had lots of new piglets born in the forest, almost doubling the size of our herd

Climate knowledge

What is climate adaptation?

While there is plenty of fighting left to do, global warming is already happening. Adaptation is about making the best of a changing world.

Climate knowledge

What does it mean to be carbon neutral?

Here at Wren, we help people go carbon neutral. A wave of brands are working towards the same goal. But what does that mean?

Climate knowledge

How does carbon capture work?

Carbon capture technology, first developed by oil and gas companies, may be essential to fight climate change. How do these technologies work?

Climate knowledge

What is the greenhouse effect, and how does it work?

You probably learned about the greenhouse effect, the basic scientific idea behind the climate crisis, years ago. It's never too late for a refresher.

Clean Cooking Fuel

Building software to continue briquette production through pandemic

This month, we received a letter from Peter Nyeko, the project lead behind Clean Cooking Fuel for Refugees. We're going to let him do the talking for this update.

Project update

Despite pandemic, our project shows increasing promise and success

Francisco Hernandez Cayetano, President of the Federation of the Ticuna and Yaguas Communities of the Amazon, discusses the effects of the pandemic.

Wren news

Why Wren is a Public Benefit Corporation

A Public Benefit Corporation is a new type of legal entity that lets Wren have a legally binding mission while still being able to raise outside investment, allowing us to focus on impact.

Wren news

Wren financial report: year one

We're committed to being transparent about our impact, business model, and spending. This report explains how much funding we received in the 12 months since we launched, and where it went.

Project update

State of the Fund: June '20

Once a month, subscribers receive a "State of the Climate Fund", like the one below, that breaks down what's happening on the ground across the fund's portfolio

Project update

Maintaining food security during COVID-19

By growing fruit and nut trees on their own land, farmers are not just sequestering carbon—they're providing for themselves.

Climate knowledge

What do people mean by climate justice?

There is increasing interest in centering climate action around the idea of justice—of ensuring that everyone in the world is being served as we solve the climate crisis.

Climate knowledge

What is reforestation and does it mitigate climate change?

A study shows planting many more trees could curb climate change. Could reforestation be the key?