We buy vintage as we like the look or try to buy reclaimed/recycled.
Flat pack furniture is affordable and easy but can have a short life and some of the materials used to make it are questionable.
IKEA have recently (2021) introduced a buy back scheme
Switch to natural fibres but don't throw out the curtains, bedding, cushions you already own switch when they need replacing.
Choose organic cotton to lesson the amount of chemicals that pollute the land. Organically farmed cotton also uses less water.
Linen is a good choice as nearly the whole flax plant is used.
Try to choose products which have used plant-based dyes.
Plants can help to reduce the toxins in the indoor environment. NASA have published a list of plants which help to clean the air.