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The Orange Box: Portal Hints
How can I get past this bunch of waste?
1 of 4: In a way similar to how you got past the previous toxic corner.
2 of 4: Get up onto the top of the slanty machinery and move along it until you can see the area past the toxic corner.
3 of 4: Fire a blue portal onto a wall next to the ledge you can see ahead, then shoot an orange portal onto a wall near you.
4 of 4: Now you can go through the orange portal to reach the ledge past the toxic waste.