A good substitute for lighter fluid when it comes to grilling is using twigs and matches. Start a small fire with brittle twigs, and then add stronger twigs and wood chunks until a solid fire is burning. After the fire is strong, add charcoal and grill as normal.
Lighter fluid helps light charcoal quickly. The more fluid used, the higher the flames. For individuals who grill a lot, it is very easy to go through lighter fluid quickly. Aside from that, it's also rather dangerous if in the hands of inexperienced grill users. Using alternatives such as twigs and matches, electric metal lighters, and metal chimneys can achieve the same results with less risk and less waste.