Emily Penn is a British sailor and the co-founder of eXXpedition - a series of all-women voyages exploring the impacts of plastics and toxins in our oceans. "The only way to reduce the potential impacts on human health and the environment is to reduce consumption," she says.

But where to begin? For the next two years, a total of 300 women will sail around the world on eXXpedition's voyages of discovery, to look deep into what's going on with plastic in our oceans, and try to come up with solutions.

Why XX? Women are underrepresented in science and sailing - the XX in the title refers to the female sex chromosome. Could plastic pollution be gender discriminatory? Could women suffer greater effects from it than men? Remember, pollution can bio-accumulate - the fish eat the plastic, and we eat the fish. Of the estimated 700 contaminants in our bodies, many have barely been researched.

How to shop secondhand (& why you should). British stylist Bay Garnett started working in fashion in the late ‘90s, and edited the NY version of Cheap Date - a zine started in London by Kira Joliffe, inspired by a love for thrifting. Bay famously put Kate Moss in the pages of British Vogue wearing vintage and has long been top of Clare’s list of charity shop fashionistas.

Her latest project? Second-hand September for Oxfam.

Find out how she does it, how thrifting has changed over 20 yrs, and why giving garments multiple lives is more important than ever as a tool to reduce fashion’s environmental impact.