During the years I have been following the climate debate since the failed Copenhagen COP15 talks in 2009, I have never been more optimistic than I am today, the week after all the 195 UN countries finally came together to secure a global deal on climate change.
We've heard this all before. You said you'd be the greenest government ever. We believed you. You hung out with huskies. We believed you. Time and time again. You put a wind turbine on your house. We believed you. We wanted to believe you.
There is an alternative. Where countries educate and empower women, ensure reliable access to a range of family planning methods and promote the benefits of smaller families, birth rates fall quickly to western levels.
Our world leaders have agreed a surprisingly ambitious deal in Paris to tackle the challenge posed by climate change. But in our efforts to manage our expectations do we risk finding ourselves slightly under-prepared for the response that is now required?
The Paris Climate Change Conference (also known as COP21) is a political milestone in the global fight against climate change. All 195 participating countries agreed to the resulting Paris Agreement. I will examine the key lessons from the negotiations in five categories that matter the most: diplomacy, politics, law, business and economics.
Successful economies today have governments prepared to take a strategic approach to how development takes place. The old idea that simply exposing new industries to the full blast of competition will promote their development is increasingly discredited... But the Tories are stuck in the past, and ducking the challenge. In November, the UK became the only G7 country to increase fossil fuel subsidies. We are paying out £6billion a year, almost twice the financial support we provide renewable energy providers - which we are now continuing to cut. After the deal struck in Paris over the weekend, the shift to a low-carbon economy is inevitable. The government should be supporting this transition, not hampering it.
The future of the UN's new Global Goals and the promises to end extreme poverty, the health and well-being of those who are most vulnerable, and even the fate of peanut crops like Diallo's are all at stake as these world leaders return home to consider the promises made. What is needed next is action to ensure finance for adaptation goes where it's most needed, and that the poorest and most vulnerable are given priority.
We talk about sustainability and climate change, about how to fight it, how to live green and how to raise awareness. Often, we wonder what it will take for people to understand the serious situation our planet is in.
From the high street to the boutiques, a willingness to embrace an environmentally friendly image in fashion has always existed. But now, substance is beginning to back up the motivation...
On Saturday, when the final agreement emerges, the EU more than any other economic block will need to see a clear and unambiguous signal that the world is serious about tackling this issue and that the momentum for change is now unstoppable.
This is the better meaning of Christmas: not that we receive from a supply that will never end, but that, in the dead of night, in acknowledgement of the limited resources that this world has, we recognise our common worth and equality and share what we have with those who have less.
We often hear it said that there are too many people on Earth, that 'overpopulation' is an existential threat, and that fewer people might consume proportionately less, resulting in some easy environmental gains such as less carbon output and fewer species extinctions. It's a seductive logic, but is it true?
It's great to give and receive cards at Christmas, but all the card and paper that gets generated is not great for the environment. Luckily, there are a few ways to keep your seasonal greetings green!
A Paris deal would be the final piece in the post-2015 global sustainability framework jigsaw. Such an agreement would also bolster the prospects of a carbon system emerging, from Asia-Pacific to the Americas, with potential to become a game-changing development in the fight against global warming.
Ethical travel is becoming more popular, but we still have a negative impact on our environment to the point where it is just a matter of years until some of the most beautiful places on the planet will have disappeared. Not just animals can be endangered; there are also a number of places which could vanish very soon.
As a species we have tremendous talents. Our scientific achievements are incredible; our advances in medicine and technology are stunning. So let us give our ingenuity and imagination a free reign to think beyond our borders. Let us work together to face climate change in a spirit of fairness and justice, guided by our shared humanity regardless of where we happen to live.