It’s all in the wax
Probably the oldest portable Pagan tool is the candle. Candles aid us in our rituals, spells, prayers, scrying, and invocations- the wax as vital as the flame. But today, many of the candles that are used as tools and ambiance are made out of paraffin wax. Paraffin is petroleum-based; it supports fossil fuel extraction, fracking, global warming, and paraffin is made from hydrocarbons that do not fully biodegrade unless mixed with hexadecane (and even then, only by one species of bacteria). However, using candles made from alternative waxes like beeswax, [sustainable] soy (water soluble), bayberry, and [sustainable] palm wax (also known as carnauba wax, though rarely sustainable); is much healthier for the environment and typically does not soot as much. Another popular blend of plant-based wax is coconut with another plant-based (typically soy). And if the wicks are wooden, make sure they’re sustainably (like FSC) sourced, and upcycled or post-consumer recycled materials, such as with jars. If they are textile, aim for ones with hemp wicks instead of cotton, as hemp requires a fraction of the water that cotton needs when grown.
For a manufacturer example, check out this PEA-certified company that works hard to make sure all of its candle products are environmentally safe and innocuous.