Bamboo is sustainable as it grows rapidly, is better for the environment than other materials like hardwood and plastic and Bamboo produces more carbon dioxide than trees.
Bamboo is more environmentally friendly than hardwood. Compared to an equivalent tree mass, Bamboo produces 35% more oxygen and in research has shown that Bamboo can absorb as much as 12 tonnes of carbon dioxide per ten thousand square metres per year.
Growing and harvesting Bamboo is very sustainable as the plant often grows rapidly and it doesn't require and chemical pesticides or fertilisers to help grow.
Manufacturing raw Bamboo into accessories and furniture isn't very energy intensive and doesn't involve chemicals compared to some wood based furniture manufacturing.
Compared to woods, Bamboo is a much lighter material; meaning it will have a smaller carbon footprint in logistics and transport (I can imagine this may only make a difference when in large quantities).
If treated correctly, Bamboo products can last a lifetime due to its strength and resillience to water and other environmental factors. This is good for the environment as you don't have to keep purchasing replacements. When it finally reaches its end-of-life, Bamboo can be recylced to create a carbon-negative footprint. You can also compost and bio-degrade Bamboo. When it finally decomposes it can help out the growth of plants as it has a high silica content, which it releases into the soil when it breaks down. Silica can help plants become more drought-resistant, increase crop yields, and generally improve crop quality as the soil becomes nutrient-rich. In addition, silica strengthens cell walls and protects against fungal diseases like mildew.
Overall, the whole process of growing, manufacturing and disposing of Bamboo is sustainable and at times carbon-negative. Bamboo could even "save the world" as spoken about by Pablo van der Lugt, he described Bamboo as the solution to replace commonly used building products that may be depleted within a century or so.
In the Bathroom, other products made out of materials like plastic and acrylic are very common and have terrible effects on the environment. Acrylic baths often end up in landfills as they contain materials not able to be re-used or melted down. Using a steel bath or shower tray can be a huge step in making your house more eco-friendly.